Novosphingobium ginsenosidimutans sp. nov., with the Ability to Convert Ginsenoside
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( Jin Kwang Kim ) , ( Dan He ) , ( Qing Mei Liu ) , ( Hye Yoon Park ) , ( Mi Sun Jung ) , ( Min Ho Yoon ) , ( Sun Chang Kim ) , ( Wan Taek Im )
한국미생물생명공학회(구 한국산업미생물학회)
Journal of Microbiology and Biotechnology 2013년, 제23권 제4호, 444~450페이지(총7페이지)
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    A Gram-negative, strictly aerobic, non-motile, non-sporeforming, and rod-shaped bacterial strain designated FW-6T was isolated from a freshwater sample and its taxonomic position was investigated by using a polyphasic approach. Strain FW-6T grew optimally at 10-42oC and at pH 7.0 on nutrient and R2A agar. Strain FW-6T displayed β- glucosidase activity that was responsible for its ability to transform ginsenoside Rb1 (one of the dominant active components of ginseng) to Rd. On the basis of 16S rRNA gene sequence similarity, strain FW-6T was shown to belong to the family Sphingomonadaceae and was related to Novosphingobium aromaticivorans DSM 12444T (98.1% sequence similarity) and N. subterraneum IFO 16086T (98.0%). The G+C content of the genomic DNA was 64.4%. The major menaquinone was Q-10 and the major fatty acids were summed feature 7 (comprising C18:1 ω9c/ ω12t/ω7c), summed feature 4 (comprising C16:1 ω7c/iso- C15:0 2OH), C16:0, and C14:0 2OH. DNA and chemotaxonomic data supported the affiliation of strain FW-6T to the genus Novosphingobium. Strain FW-6T could be differentiated genotypically and phenotypically from the recognized species of the genus Novosphingobium. The isolate that has ginsenoside converting ability therefore represents a novel species, for which the name Novosphingobium ginsenosidimutans sp. nov. is proposed, with the type strain FW-6T (= KACC 16615T = JCM 18202T).
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